JPH0652180B2 - Human activity amount calculator - Google Patents

Description

The present invention relates to a human body activity amount calculating device which is convenient for use in controlling an air conditioner, for example.

<Prior Art> Conventionally, there is the following air conditioner using a human activity amount calculation device (Japanese Patent Application No. 61-122639). This air conditioner includes a room temperature sensor that detects an indoor temperature, a temperature setting unit that sets a target temperature, a human body detection sensor that detects movement of a human body and outputs according to the movement of the human body, and a set temperature changing unit. Having, the count value of the signal from the human body detection sensor within a predetermined time (the number of times the human body has moved) and the amount of human activity, the preset temperature set by the temperature setting means in advance, from the human body detection sensor The temperature is changed by the set temperature changing means based on the count value of the signal.

<Problems to be Solved by the Invention> Factors of the amount of human activity include the number of times the human body moves and the degree of movement.

However, the above-mentioned conventional human body activity amount calculation device sets the activity amount only by the count value of the signal from the human body detection sensor, that is, the number of times the human body moves, and changes the set temperature based on the number of times the human body moves. Therefore, when calculating the amount of human activity, the degree of movement of the human body is not taken into consideration, and there is a problem in that the amount of human activity that actually matches cannot be obtained.

Therefore, an object of the present invention is to count the level signals corresponding to the degree of activity output from the human body detection sensor for each level range, and to weight each count value by the above level range to determine the movement of the human body. An object of the present invention is to provide a human body activity amount calculation device capable of calculating an actually human body activity amount based on the number of times and the degree of movement.

<Means for Solving the Problems> In order to configure the above object, the human body activity amount calculating device of the present invention outputs a signal having a voltage according to the amount of heat produced by the human body, as illustrated in FIG. A detecting device 1 and a selecting means for receiving a signal from the human body detecting device 1 and selecting the signal according to a voltage range, and a counting means for counting the appearance value of the signal selected by the selecting means according to the voltage range. And a human body activity for weighting the count value of the signal counted by the counting means with a preset weight for each voltage range, and calculating a human activity amount based on the weighted count value of the signal. It is characterized by having a quantity calculating means.

<Operation> A signal output from the human body detection device 1 and having a voltage according to the amount of heat produced by the activity of the human body is sorted by the sorting means according to the voltage range. Then, the appearance values of the selected signals were counted by the counting means for each of the voltage ranges. Then, the human body activity amount calculating means assigns a weight set in advance for each of the voltage ranges to the count value for each range of the voltage counted by the counting means, and to the count value of the weighted signal. Based on this, the human body count value is calculated.

Therefore, it is possible to calculate the amount of human activity based on the number of times the human body moves and the degree of movement.

<Example> Hereinafter, the present invention will be described in detail with reference to illustrated examples.

FIG. 1 is a block diagram of a control device for an air conditioner using the present invention. Hereinafter, a case where the human body activity amount calculating device of the present invention is used for controlling an air conditioner will be described. First
In the figure, 1 is a human body detection device that detects the presence of a human body and outputs a signal at a level according to the amount of heat produced by the human body. 2 is a room temperature sensor that detects the temperature inside the room and outputs a signal according to room temperature. Is an A / D conversion circuit for A / D converting the signal from the human body detection device 1, 4 has a selection means, a counting means and a human body activity amount calculation means, and controls the overall operation of the control device of the air conditioner. A microcomputer having a CPU (Central Processing Unit), a memory for storing programs for this CPU, and the like;
Is an inverter control circuit for controlling the frequency of the frequency-variable compressor 6 by a control signal from the control circuit to control the rotation speed of the compressor 6. The human body detection device 1, the A / D conversion circuit 3 and the microcomputer 4 constitute a human body activity amount calculation device.

FIG. 2 is a schematic view of the human body detection device 1. Sensor
A pyroelectric infrared sensor 11 is installed substantially in the center of one side surface of the box 10. On the other hand, the other side opposite to the one side is divided into a grid of bases and Fresnel
With the lens 12 inserted, the infrared rays emitted from the human body are radiated by the Fresnel lens 12 no matter where the human body is in the room.
The pyroelectric infrared sensor 11 can collect light.

As shown in FIG. 3, the human body detection device 1 is installed in the lower part of the front surface of the indoor unit body 13 of the air conditioner installed in the upper part of the wall surface of the room which is the living area so as to face the indoor human body monitoring area. It As a result, the human body detection device 1 radially monitors the human body in the room as shown in FIG. A detection area 15 in the drawing is an area corresponding to the Fresnel lens 12 in FIG. 2, and a human body is detected when a human body is present in this area.
The detected area 14 is an area corresponding to the Fresnel lens 12 and the Fresnel lens 12 adjacent to the Fresnel lens 12, and the human body is not detected when a human body is present in this area.

The human body detection device 1 installed as described above detects the movement of the human body as follows. That is, the human body or a part of the human body is the detection area 15 and the detection area 14 shown in FIG.
After passing or slightly crossing, the pyroelectric infrared sensor 11 outputs a signal of voltage V as shown in FIG. This voltage value V varies depending on the amount of heat produced by the human body. Therefore, by reading this voltage value, the degree of movement of the human body can be detected by the amount of heat production. Since the signal shown in FIG. 5 is output every time the human body moves, the number of times the human body moves can be detected at the same time by counting the number of times the signal is output.

That is, the degree of movement of the human body and the number of movements can be detected by the pyroelectric infrared sensor 11.

Next, a method of calculating the activity amount of the human body based on the data detected as described above will be described in detail.

In order to select the signal from the human body detection device 1 according to its level, the level range of the voltage V is, for example, as shown in Table 1, ~ Va, Va ~ Vb, Vb ~ Vc, Vc ~ Vd, Vd ~. It is divided into 5 stages. Then, the selecting means of the microcomputer 4 selects which of the five level levels the signal level from the pyroelectric infrared sensor 11 falls into, and the counting means selects at the time interval t 2. Count the number of signals by level range. Table 1 shows that the counting result by the counting means is Na to Ne.

Next, the human body activity amount calculating means weights the number of times of operation Na, Nb, ..., Ne of the human body counted as described above according to each voltage level range according to Table 1, and calculates the following equation.
The human activity amount N is calculated by (1).

N = a * Na + b * Nb + c * Nc + d * Nd + e * Ne (1) a to e: weight constants Next, the air conditioning performed based on the human body activity amount calculated by the human body activity amount calculation device as described above. The control of the machine will be described.

From the above-mentioned human activity amount N, the degree ΔT that the human activity amount N affects the sensible temperature can be obtained according to Table 2. Then, the frequency of the compressor 6 is controlled as follows according to the degree ΔT in which the obtained amount of human activity affects the sensible temperature.

Generally, the frequency of the inverter type compressor is determined by the difference between the set temperature Ts and the actual room temperature Ta based on the signal from the room temperature sensor 2. In the present invention, the frequency control of the compressor 6 is performed in the same manner as described above, but in this case, the corrected room temperature Tb calculated by the following equation (2) is used instead of the actual room temperature Ta.

Tb = Ta + ΔT (2) As described above, performing the frequency control of the compressor 6 using the corrected room temperature Tb means that the degree to which the amount of human activity affects the sensible temperature is added to the actual room temperature Ta. Frequency control. That is, the frequency of the compressor 6 is determined according to FIG. 6 based on the difference between the set temperature Ts and the room temperature Tb corrected by adding the sensible temperature due to the amount of human activity.

FIG. 7 is a flowchart of the control operation of the air conditioner using the human activity amount calculating device of the present invention. The control operation of the air conditioner based on the amount of human activity will be described with reference to FIG.

In step S1, the signal from the human body detection device 1 is sorted according to the level range shown in Table 1 based on the voltage level of the signal.

In step S2, the signals selected in step S1 are counted by the level range.

In step S3, it is determined whether the time t has elapsed. As a result, if the time t 1 has elapsed, the process proceeds to step S4, and if not, the process returns to step S1 and the selection and counting of the signals from the human body detection device 1 are executed until the time t 2 has elapsed.

In step S4, the human body is calculated according to equation (1) according to the number of times the human body operates for each voltage level range obtained as shown in Table 1 in steps S1 and S2 and the weight constant determined for each voltage level range. The activity amount N is calculated.

In step S5, based on the human activity amount N calculated in step S6, the degree ΔT that the human activity amount N affects the sensible temperature is obtained according to Table 2.

In step S6, the room temperature Ta is detected by the room temperature sensor 2.

In step S7, the room temperature T detected in step S6 is detected.
By a and ΔT obtained in step S5,
The corrected room temperature Tb is calculated from the equation (2). Then, the frequency of the compressor 6 is determined according to FIG. 6 based on the corrected room temperature 7b.

In step S8, the frequency of the compressor 6 is changed to the above step S7.
The frequency is changed to the frequency determined in step 1, and the control operation of the air conditioner ends.

As described above, when the human body detection device 1 calculates the human body activity amount, the human body activity amount is calculated based on the number of movements of the human body and the degree of movement of the human body represented by the amount of heat production. The amount of physical activity performed can be calculated. Therefore, according to the control device of the air conditioner using the human body activity amount calculating device of the present invention, the same sensible temperature can always be obtained regardless of the activity state of the person, and the comfort is improved. You can

<Effects of the Invention> As is clear from the above, the human body activity amount calculating device of the present invention outputs the signal output from the human body detecting device, which has the voltage value corresponding to the amount of heat produced by the human body, to each voltage range by the selecting means. The appearance values are selected by the counting means for each range of the voltage, and the obtained count value is weighted for each range of the voltage by the human activity amount calculating means to calculate the human activity amount. It is possible to calculate an actual human activity amount based on the number of movements and the degree of movement.

Therefore, if the present invention is applied to, for example, a control device for an air conditioner, the same sensible temperature can always be obtained and comfort can be improved no matter how the occupant indoors.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device for an air conditioner using the present invention, FIG. 2 is a schematic diagram of a human body detection device, and FIG. 3 is an explanatory view of a state of attachment of the human body detection device to an indoor unit main body, FIG. Is an explanatory view of the detection area and non-detection area of the human body detection device,
FIG. 5 is an explanatory diagram of the output signal of the human body detecting device, FIG. 6 is an explanatory diagram of the frequency determining method of the compressor, and FIG. 7 is a flowchart of the control operation of the air conditioner using the present invention. 1 ... Human body detection device, 2 ... Room temperature sensor, 3 ... A / D conversion circuit, 4 ... Microcomputer, 5 ... Inverter control circuit, 6 ... Compressor, 10 ... Sensor box, 11 ... … Pyroelectric infrared sensor, 12 …… Fresnel lens, 13 …… Indoor unit body.

Claims (1)

[Claims] 1. A human body detection device (1) that outputs a signal having a voltage according to the amount of heat produced by a human body, and a signal from the human body detection device (1), and the signal is sorted according to a voltage range. Sorting means, counting means for counting the appearance values of the signals sorted by the sorting means for each of the voltage ranges, and weights preset for each of the voltage ranges for the counted values of the signals counted by the counting means. And a human body activity amount calculating means for calculating a human body activity amount based on the weighted count value of the signal.